Who has been buying AIAI Group Corporation stock?

7 distinct investors have filed 19 disclosed large-shareholding filings in AIAI Group Corporation (6557), most recently on 2026-01-07. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.

How many insider filings does AIAI Group Corporation have?

AIAI Group Corporation has 19 buy-side and 31 sell-side disclosures on record, covering ¥673M ($4.3M) in total reported value, spanning 2021-08-05 to 2026-01-07.

Do insider buys in Japanese stocks predict returns?

Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

AIAI Group Corporation 6557

Company

株式会社global bridge HOLDINGSAIAI Group Corporation

Investors

Buys

Total Value

¥673M ($4.3M)

Avg Return

+150.02%

Last Filing

2026-01-07

AIAI Group Corporation (6557) has 19 disclosed large-shareholding filings and 31 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥673M ($4.3M) in reported transaction value. The earliest filing StockDrifts holds for AIAI Group Corporation is dated 2021-08-05; the most recent is 2026-01-07. Across these filings the average return since disclosure is +150.02%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

Date	Type	Source	Insider	Purpose	Shares	Price at filing	Return	Value
2026-08-10	SELL	subscription	貞松成	activist	1.2M	¥767	+7.2%	¥6M ($40K)
2026-08-10	SELL	unknown	social investment株式会社	activist	630.0K	¥767	+7.2%	¥10M ($63K)
2026-08-05	SELL	unknown	social investment株式会社	activist	630.0K	¥731	+2.6%	¥10M ($66K)
2026-08-05	BUY	subscription	貞松成	activist	1.3M	¥731	-2.6%	¥82M ($530K)
2026-08-05	SELL	unknown	social investment株式会社	activist	630.0K	¥731	+2.6%	¥9M ($60K)
2026-08-05	BUY	subscription	貞松成	activist	1.3M	¥731	-2.6%	¥88M ($568K)
2026-01-07	SELL	Market Buy	渡辺崇 Takashi Watanabe	passive	286.1K	¥1,418	+49.8%	¥96M ($622K)
2025-09-03	SELL	Market Buy	渡辺崇 Takashi Watanabe	passive	353.8K	¥1,548	+54.0%	¥364M ($2.3M)
2025-09-03	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	353.8K	¥1,548	-	¥364M ($2.3M)
2025-04-14	SELL	Market Buy	渡辺崇 Takashi Watanabe	passive	588.7K	¥1,292	+44.9%	¥88M ($567K)
2025-03-28	SELL	Market Buy	渡辺崇 Takashi Watanabe	passive	656.5K	¥1,307	+45.5%	¥91M ($584K)
2025-03-26	SELL	Market Buy	渡辺崇 Takashi Watanabe	passive	726.0K	¥1,486	+52.1%	¥110M ($709K)
2025-03-05	SELL	Market Buy	渡辺崇 Takashi Watanabe	passive	800.2K	¥1,565	+54.5%	¥117M ($753K)
2025-03-03	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	874.4K	¥1,563	-	¥141M ($912K)
2025-03-03	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	874.4K	¥1,563	-54.5%	¥141M ($912K)
2024-11-28	SELL	unknown	social investment株式会社 social investment corporation	activist	630.0K	¥1,519	+53.1%	¥63M ($408K)
2024-11-28	SELL	unknown	貞松成 Joe Sadamatsu	activist	1.8M	¥1,519	+53.1%	¥155M ($1.0M)
2024-11-28	SELL	unknown	貞松成 Joe Sadamatsu	activist	1.2M	¥1,519	+53.1%	¥101M ($653K)
2024-08-07	SELL	Market Buy	三田証券株式会社 MITA SECURITIES Co.,Ltd.	passive	0	¥1,264.5	+43.7%	¥225M ($1.5M)
2024-02-22	SELL	Market Buy	三田証券株式会社 MITA SECURITIES Co.,Ltd.	passive	178.0K	¥630	-13.0%	¥22M ($141K)
2024-02-05	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	452.7K	¥696.5	+2.2%	¥26M ($168K)
2024-02-05	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	415.4K	¥696.5	-	¥23M ($149K)
2024-02-05	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	415.4K	¥696.5	+2.2%	¥25M ($163K)
2024-02-01	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	379.3K	¥617	+15.4%	¥19M ($121K)
2024-01-29	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	348.9K	¥582	+22.3%	¥22M ($143K)
2024-01-19	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	310.7K	¥549.5	+29.6%	¥17M ($109K)
2024-01-16	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	280.1K	¥564.5	+26.1%	¥14M ($93K)
2024-01-10	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	254.0K	¥505	-	¥19M ($125K)
2024-01-10	SELL	Market Buy	渡辺崇 Takashi Watanabe	passive	254.0K	¥505	-41.0%	¥19M ($125K)
2024-01-10	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	254.6K	¥505	-	¥19M ($125K)
2023-12-28	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	216.0K	¥488.5	+45.8%	¥15M ($99K)
2023-12-12	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	184.7K	¥435	+63.7%	¥14M ($87K)
2023-12-12	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	154.1K	¥435	+63.7%	¥67M ($432K)
2023-12-12	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	184.7K	¥435	-	¥13M ($86K)
2023-12-12	BUY	Market Buy	渡辺崇 Takashi Watanabe	passive	154.1K	¥435	-	¥67M ($432K)
2023-11-24	SELL	unknown	貞松成 Joe Sadamatsu	activist	592.1K	¥422.5	-68.5%	¥25M ($164K)
2023-11-24	SELL	unknown	貞松成 Joe Sadamatsu	activist	592.1K	¥422.5	-68.5%	¥25M ($164K)
2023-11-24	SELL	unknown	social investment株式会社 social investment corporation	activist	315.0K	¥422.5	-68.5%	¥18M ($113K)
2023-11-24	SELL	unknown	social investment株式会社 social investment corporation	activist	315.0K	¥422.5	-68.5%	¥18M ($113K)
2023-03-23	BUY	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	119.0K	¥458.5	+55.3%	¥54M ($347K)
2023-03-23	BUY	unknown	UBS証券株式会社 UBS Securities Co., Ltd.	other	15.1K	¥458.5	+55.3%	¥7M ($44K)
2023-03-07	BUY	unknown	ユービーエス・エイ・ジー(銀行) UBS AG	other	146.3K	¥486	+46.5%	¥71M ($459K)
2023-03-07	BUY	unknown	UBS証券株式会社 UBS Securities Co., Ltd.	other	0	¥486	+46.5%	-
2023-02-14	SELL	Market Buy	三田証券株式会社 MITA SECURITIES Co.,Ltd.	passive	210.0K	¥470	-51.5%	¥66M ($425K)
2023-02-02	SELL	Market Buy	三田証券株式会社 MITA SECURITIES Co.,Ltd.	passive	360.0K	¥447.5	-59.1%	¥40M ($261K)
2022-08-04	BUY	unknown	株式会社アニヴェルセルHOLDINGS ANNIVERSIRE HOLDINGS INC.	strategic	1.1M	¥340	-	¥44M ($281K)
2022-08-04	SELL	unknown	株式会社アニヴェルセルHOLDINGS ANNIVERSIRE HOLDINGS INC.	strategic	1.1M	¥340	-109.4%	¥44M ($281K)
2022-07-08	BUY	Market Buy	三田証券株式会社 MITA SECURITIES Co.,Ltd.	passive	460.0K	¥340	+109.4%	¥156M ($1.0M)
2022-02-22	BUY	unknown	貞松成 Joe Sadamatsu	activist	592.1K	¥302	+135.8%	¥4M ($23K)
2022-02-22	BUY	Market Buy	貞松成 Joe Sadamatsu	activist	592.1K	¥302	+135.8%	¥4M ($23K)

Showing the 50 most recent of 66 filings.

Frequently asked questions

Who has been buying AIAI Group Corporation stock?: 7 distinct investors have filed 19 disclosed large-shareholding filings in AIAI Group Corporation (6557), most recently on 2026-01-07. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.
How many insider filings does AIAI Group Corporation have?: AIAI Group Corporation has 19 buy-side and 31 sell-side disclosures on record, covering ¥673M ($4.3M) in total reported value, spanning 2021-08-05 to 2026-01-07.
Do insider buys in Japanese stocks predict returns?: Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.